In any White House, discretion is a prized value in staffers, and perhaps even more so in the Donald Trump era. As Trump’s personal assistant in the Oval Office, Madeleine Westerhout should have known that better than most. Yet Westerhout has been shown the door, as multiple news organizations reported overnight, for sharing personal information about the First Family with reporters: President Trump’s personal assistant Madeleine Westerhout resigned from her job abruptly, a White House official and another person familiar with the situation told NBC News late Thursday night.One of the sources said that Westerhout left the job because...